ABB 57310001-S Expansion Unit

ABB 57310001-S Expansion Unit is an expansion board designed for the DSPX 310 control processor in ABB/ASEA automation systems; it serves as a companion module that extends the DSPX 310 family’s expansion capability, enabling seamless integration with existing DSPX 310 controllers in legacy and current ABB installations. Also cataloged as ASEA 57310001-S EXPANSION UNIT BOARD, CX, the component appears in distributor inventories as a spare or expansion module for DSPX 310 installations, and is commonly described in listings as refurbished or surplus equipment sourced for repairs or retrofits. Because it is labeled explicitly as an expansion unit board, the part number 57310001-S identifies it within ABB and ASEA spare parts catalogs, helping technicians verify compatibility with DSPX 310 control systems and plan replacements or system upscaling in ABB-based control architectures. Purchasers should confirm the unit's condition and compatibility with their DSPX 310 controller revision and any on-site interface requirements before use, since ABB spare parts are often cataloged across multiple listings and may be traded as refurbished stock by third-party vendors.